“Whoever reads <<قُلۡ هُوَ ٱللَّهُ أَحَدٌ>> << Say, ‘He is Allaah, [Who is] One>> [Soorah Ikhlaas] until he finishes it ten times, then Allaah builds a Palace for him in Paradise as well as additional benefits.

‘Umar said: ‘Then we will have a lot of Palaces, O Messenger of Allaah!’

The Prophet – salallaahu ‘alayhi wa sallam – said: Allaah has more and what is better.” [Silsilah Ahadeeth as-Saheehah by Shaykh al-Albaani No.589]

Source: Click on the linked part of the headline, or here. Here is the homepage of this highly beneficial website of our beloved brother Abbas Abu Yahya (hafidhahullaah).